Exhibit 22.1

Subsidiary Guarantors and Issuers of Guaranteed Securities

The table below sets forth the respective issuers, co-issuers, and guarantors of the notes issued by Aon Global Limited, Aon Global Holdings plc, and Aon Corporation and the jurisdiction of incorporation of each such entity.

 

      Aon Corporation    Aon Global Limited    Aon North America, Inc.   

Aon Corporation and

Aon Global Holdings plc

Entity   

Jurisdiction of

Incorporation

   

8.205% Junior Subordinated Notes due

2027

4.50% Senior Notes due 2028

3.75 Senior Notes due 2029

2.80% Senior Notes due 2030

6.25% Senior Notes due 2040

   

2.875% Senior Notes due 2026

4.25% Senior Notes due 2042

4.45% Senior Notes due 2043

4.60% Senior Notes due 2044

4.75% Senior Notes due 2045

   

5.125% Senior Notes due 2027

5.150% Senior Notes due 2029

5.300% Senior Notes due 2031

5.450% Senior Notes due 2034

5.750% Senior Notes due 2054

   

2.85% Senior Notes due 2027 2.05%

Senior Notes due 2031 2.60% Senior

Notes due 2031 5.00% Senior Notes due

2032

5.35% Senior Notes due 2033

2.90% Senior Notes due 2051 3.90%

Senior Notes due 2052

Aon plc    Ireland    Guarantor    Guarantor    Guarantor    Guarantor
Aon Global Limited    UK    Guarantor    Issuer    Guarantor    Guarantor
Aon Global Holdings plc    UK    Guarantor    Guarantor    Guarantor    Co-Issuer
Aon Corporation    US    Issuer    Guarantor    Guarantor    Co-Issuer
Aon North America, Inc.    US    Guarantor    Guarantor    Issuer    Guarantor